Display screen or portion thereof with icon



FIG. 1 is a front view of a display screen or portion thereof with icon, showing my new design; and,

FIG. 2 is a front view thereof, in which a mobile terminal in broken lines is provided to illustrate an example environment.

The broken lines are for environmental purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with icon, as shown and described. 